CN105892017A - Camera lens - Google Patents
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- CN105892017A CN105892017A CN201610279378.9A CN201610279378A CN105892017A CN 105892017 A CN105892017 A CN 105892017A CN 201610279378 A CN201610279378 A CN 201610279378A CN 105892017 A CN105892017 A CN 105892017A
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- 238000009738 saturating Methods 0.000 claims description 2
- 230000004075 alteration Effects 0.000 abstract description 25
- 230000003287 optical effect Effects 0.000 abstract description 11
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000012937 correction Methods 0.000 description 15
- 239000011521 glass Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 9
- 238000011161 development Methods 0.000 description 8
- 238000003384 imaging method Methods 0.000 description 8
- 241000700608 Sagitta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
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- Optics & Photonics (AREA)
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Abstract
The invention provides a camera lens, which comprises five lens and has excellent optical characteristics, the lens is ultrathin and has wide angles, and chromatic aberration is fully corrected. The camera lens is provided with the following components from an object side in order: a first lens with positive refractive index, a second lens with negative refractive index, a third lens, a forth lens with positive refractive index, and a fifth lens with negative refractive index; the camera lens has characteristics for satisfying all regulated conditions.
Description
[technical field]
The present invention relates to the invention of pick-up lens.Particularly relate to for use high pixel CCD,
It is especially suitable for for the mobile phone camera assembly of the imaging apparatuss such as CMOS, WEB camera lens are first-class.This
The pick-up lens of invention comprises 5 lens, has outstanding optical signature；Simultaneously, TTL (light schoolmate
Degree)/IH (image height) 1.42, ultra-thin, entirely draw angle (hereinafter referred to as 2 ω) more than 76 °, chromatic aberration abundant
The wide-angle camera of correction.
[background technology]
In recent years, the various camera heads using the shooting original papers such as CCD and CMOS are widely available.
Along with imaging apparatus miniaturization, high performance development, society's more demand have outstanding optical signature,
The wide-angle camera that ultra-thin and chromatic aberration fully makes corrections.
With there is outstanding optical signature, 5 wide-angle camera phases that ultra-thin and chromatic aberration fully makes corrections
The technological development closed is at iterative method.Patent documentation 1,2 proposes a plan as pick-up lens by 5 lens
Composition, starts from thing side to be to have the 1st lens of positive refracting power, have the 2nd saturating of negative index successively
Mirror, the 3rd lens, there are the 4th lens of positive refracting power, there are the 5th lens of negative index.
In patent documentation 1, the pick-up lens disclosed in example 1～5 is made up of above-mentioned 5 lens, but the
The refractive index distribution of 4 lens is insufficient with the shape of the 1st lens, so TTL/LH 1.58 ultrathin
Not enough.
In patent documentation 2, the pick-up lens disclosed in example 1～6 is made up of above-mentioned 5 lens, but
The refractive index distribution of the 2nd lens is insufficient with the shape of the 1st lens, so ultrathin is not enough.
[prior art references]
[patent documentation 1] patent the 5513641st
[patent documentation 2] JP 2015-225246 publication
[summary of the invention]
It is an object of the invention to provide by having outstanding optical signature, ultra-thin and chromatic aberration fully makes corrections
The wide-angle camera of 5 lens composition.
For reaching above-mentioned purpose, in the refractive index distribution to the 1st lens, the 2nd lens, the 4th lens,
The focus that 1st lens, the shape of the 2nd lens and the 4th lens center thickness are overall with pick-up lens
After ratio of distances constant is conscientiously discussed, propose to improve the pick-up lens scheme of conventional art, then form this
Invention.
Solving the technical problem that according to above-mentioned need, described pick-up lens starts to be configured with successively from thing side: tool
There are the 1st lens of positive refracting power, there are the 2nd lens of negative index, the 3rd lens, have and just roll over
Penetrate the 4th lens of rate, there are the 5th lens of negative index, and meet following condition formula (1)～(6),
0.70≦f1/f≦0.80 (1)；
-2.00≦f2/f≦-1.15 (2)；
0.63≦f4/f≦0.80 (3)；
-2.00≦(R1+R2)/(R1-R2)≦-1.25 (4)；
1.30≦(R3+R4)/(R3-R4)≦2.50 (5)；
0.10≦d7/f≦0.19 (6)；
Wherein,
The focal length that f: pick-up lens is overall；
The focal length of the f1: the 1 lens；
The focal length of the f2: the 2 lens；
The focal length of the f4: the 4 lens；
The radius of curvature of the thing side of the R1: the 1 lens；
The radius of curvature of the image side surface of the R2: the 1 lens；
The radius of curvature of the thing side of the R3: the 2 lens；
The radius of curvature of the image side surface of the R4: the 2 lens；
The center thickness of the d7: the 4 lens.
As a modification of the present invention, described pick-up lens also meets following condition formula (7),
10.00≦|f3|/f (7)；
Wherein,
The focal length that f: pick-up lens is overall；
The focal length of the f3: the 3 lens.
The beneficial effects of the present invention is: according to the pick-up lens of the present invention, there is outstanding optical characteristics,
Ultra-thin, Radix Rumicis and chromatic aberration fully make corrections, and are particularly suited for being taken the photograph by CCD, CMOS etc. of high pixel
The mobile phone camera lens assembly of element composition and WEB pick-up lens.
[accompanying drawing explanation]
Fig. 1 is the composition displaying figure of the pick-up lens LA relevant to one embodiment of the present invention.
Fig. 2 is the composition displaying figure of the instantiation 1 of above-mentioned pick-up lens LA.
Fig. 3 is the axial aberration displaying figure of pick-up lens LA in example 1.
Fig. 4 is the chromatic longitudiinal aberration displaying figure of pick-up lens LA in example 1
Fig. 5 be in example 1 in pick-up lens LA the curvature of field and distortion displaying figure
Fig. 6 is the composition displaying figure of the instantiation 2 of above-mentioned pick-up lens LA.
Fig. 7 is the axial aberration displaying figure of pick-up lens LA in example 2.
Fig. 8 is the chromatic longitudiinal aberration displaying figure of pick-up lens LA in example 2
Fig. 9 be in example 2 in pick-up lens LA the curvature of field and distortion displaying figure
[detailed description of the invention]
Reference Design figure illustrates a kind of embodiment of pick-up lens related to the present invention.Fig. 1 shows
Go out the pie graph of the pick-up lens of an embodiment of the present invention.This pick-up lens LA is by 5 lens
Composition, configures the 1st lens L1, the 2nd lens L2, the 3rd lens L3 from thing side successively to imaging surface side
, the 4th lens L4, the 5th lens L5.Between the 5th lens L5 and imaging surface, it is configured with glass and puts down
Plate GF.This glass plate GF can use cover glass or have IR and prevent filter function.?
Being not provided with glass plate GF between 5th camera lens L5 and imaging surface can also.
1st lens L1 has positive refracting power, and the 2nd lens L2 has negative index, the 3rd lens L3 tool
Having positive refracting power or negative index, the 4th lens L4 to have positive refracting power, the 5th lens L5 has negative folding
Penetrate rate.For the Aberration Problem that can preferably make corrections, preferably these 5 lens surfaces are designed as aspherical shape.
Pick-up lens LA is to meet following condition formula (1)～the pick-up lens of (6),
0.70≦f1/f≦0.80 (1)；
-2.00≦f2/f≦-1.15 (2)；
0.63≦f4/f≦0.80 (3)；
-2.00≦(R1+R2)/(R1-R2)≦-1.25 (4)；
1.30≦(R3+R4)/(R3-R4)≦2.50 (5)；
0.10≦d7/f≦0.19 (6)；
Wherein,
The focal length that f: pick-up lens is overall；
The focal length of the f1: the 1 lens L1；
The focal length of the f2: the 2 lens L2；
The focal length of the f4: the 4 lens L4；
The radius of curvature of the thing side of the R1: the 1 lens L1；
The radius of curvature of the image side surface of the R2: the 1 lens L1；
The radius of curvature of the thing side of the R3: the 2 lens L2；
The radius of curvature of the image side surface of the R4: the 2 lens L2；
The center thickness of the d7: the 4 lens L4.
Condition formula (1) defines the positive refracting power of the 1st lens L1.When exceeding under condition formula (1)
Limit gauge timing, the positive refracting power of the 1st lens L1 can be too strong, it is difficult to is difficult to Radix Rumicis while correction aberration
Change development；On the contrary, when exceeding upper limit regulation, the refractive index of the 1st lens L1 can be the most weak, it is difficult to ultra-thin
Change development.
At this, preferably the numerical range of condition formula (1) is set in the number of following condition formula (1-A)
In the range of value,
0.72≦f1/f≦0.78 (1-A)。
Condition formula (2) defines the negative index of the 2nd lens L2.Outside the scope of condition formula (2),
Along with to Radix Rumicis, ultrathin development, it is difficult to chromatic aberration on correction axle, outside axle.
At this, preferably the numerical range of condition formula (2) is set in the number of following condition formula (2-A)
In the range of value,
-1.90≦f2/f≦-1.40 (2-A)。
Condition formula (3) defines the positive refracting power of the 4th lens L4.By meeting condition formula (3),
Fully make corrections on axle, outside axle under the state of chromatic aberration, for Radix Rumicis, ultrathin more effectively.
At this, preferably the numerical range of condition formula (3) is set in the number of following condition formula (3-A)
In the range of value,
0.65≦f4/f≦0.75 (3-A)。
Condition formula (4) defines the shape of the 1st lens L1.Outside the scope of condition formula (4), along with
To Radix Rumicis, ultrathin development, it is difficult to the high order aberration problem of correction spherical aberration etc..
At this, preferably the numerical range of condition formula (4) is set in the number of following condition formula (4-A)
In the range of value,
-1.65≦(R1+R2)/(R1-R2)≦-1.30 (4-A)。
Condition formula (5) defines the shape of the 2nd lens L2.Outside the scope of condition formula (5), along with
To Radix Rumicis, ultrathin development, it is difficult to chromatic aberration on correction axle.
At this, preferably the numerical range of condition formula (5) is set in the number of following condition formula (5-A)
In the range of value,
1.60≦(R3+R4)/(R3-R4)≦2.00 (5-A)。
Condition formula (6) define the center thickness of the 4th lens L4 focus overall with pick-up lens away from
From ratio.Outside the scope of condition formula (6), it is difficult to Radix Rumicis, ultrathin development.
3rd lens L3 is the lens with positive refracting power or negative index, meets following condition formula (7),
10.00≦|f3|/f (7)；
Wherein,
The focal length that f: pick-up lens is overall
The focal length of the f3: the 3 lens L3.
Condition formula (7) defines positive refracting power or the negative index of the 3rd lens L3.In condition formula (7)
Scope outside, along with developing to ultrathin, it is difficult on correction axle, the outer chromatic aberration of axle.
At this, preferably the numerical range of condition formula (7) is set in the number of following condition formula (7-A)
In the range of value,
11.50≦|f3|/f≦85.00 (7-A)。
All there is foregoing composition owing to constituting 5 lens of pick-up lens LA and meet all
Condition formula, thus produce there is outstanding optical signature, ultra-thin and chromatic aberration fully makes corrections by 5
The wide-angle camera of individual lens composition is possibly realized.
The pick-up lens LA of the present invention will be illustrated below with example.Symbol described in each example
Number as follows.Distance, radius are mm with the unit of center thickness.
F: pick-up lens LA overall focal length；
The focal length of the f1: the 1 lens L1；
The focal length of the f2: the 2 lens L2；
The focal length of the f3: the 3 lens L3；
The focal length of the f4: the 4 lens L4；
The focal length of the f5: the 5 lens L5；
Fno:F value；
2 ω: entirely draw angle；
S1: aperture；
Radius of curvature centered by when the radius of curvature of R: optical surface, lens；
The radius of curvature of the thing side of the R1: the 1 lens L1；
The radius of curvature of the image side surface of the R2: the 1 lens L1；
The radius of curvature of the thing side of the R3: the 2 lens L2；
The radius of curvature of the image side surface of the R4: the 2 lens L2；
The radius of curvature of the thing side of the R5: the 3 lens L3；
The radius of curvature of the image side surface of the R6: the 3 lens L3；
The radius of curvature of the thing side of the R7: the 4 lens L4；
The radius of curvature of the image side surface of the R8: the 4 lens L4；
The radius of curvature of the thing side of the R9: the 5 lens L5；
The radius of curvature of the image side surface of the R10: the 5 lens L5；
The radius of curvature of the thing side of R11: glass plate GF；
R12: the radius of curvature of the image side surface of glass plate GF；
Distance between center thickness and the lens of d: lens；
D0: distance from the axle of the thing side of aperture S1 to the 1st lens L1；
The center thickness of the d1: the 1 lens L1；
The image side surface of the d2: the 1 lens L1 is to distance on the axle of the thing side of the 2nd lens L2；
The center thickness of the d3: the 2 lens L2；
The image side surface of the d4: the 2 lens L2 is to distance on the axle of the thing side of the 3rd lens L3；
The center thickness of the d5: the 3 lens L3；
The image side surface of the d6: the 3 lens L3 is to distance on the axle of the thing side of the 4th lens L4；
The center thickness of the d7: the 4 lens L4；
The image side surface of the d8: the 4 lens L4 is to distance on the axle of the thing side of the 5th lens L5；
The center thickness of the d9: the 5 lens L5；
The image side surface of the d10: the 5 lens L5 is to distance on the axle of the thing side of glass plate GF；
D11: the center thickness of glass plate GF；
D12: distance on the image side surface of glass plate GF to the axle of imaging surface；
The refractive index of nd:d line；
The refractive index of the d line of the nd1: the 1 lens L1；
The refractive index of the d line of the nd2: the 2 lens L2；
The refractive index of the d line of the nd3: the 3 lens L3；
The refractive index of the d line of the nd4: the 4 lens L4；
The refractive index of the d line of the nd5: the 5 lens L5；
The refractive index of the d line of nd6: glass plate GF；
ν d: Abbe number；
The Abbe number of ν 1: the 1 lens L1；
The Abbe number of ν 2: the 2 lens L2；
The Abbe number of ν 3: the 3 lens L3；
The Abbe number of ν 4: the 4 lens L4；
The Abbe number of ν 5: the 5 lens L5；
ν 6: the Abbe number of glass plate GF；
TTL: optical length (the thing side of the 1st lens L1 is to distance on the axle of imaging surface)；
The image side surface of the LB: the 5 lens L5 (comprises glass plate GF to distance on the axle of imaging surface
Thickness)；
IH: image height
Y=(x2/R)/[1+{1-(k+1) (x2/R2) } 1/2]+A4x4+A6x6+A8x8+A10x10+A12x12
+A14x14+A16x16 (8)
Wherein, R is the radius of curvature on axle, and k is circular cone coefficient, A4, A6, A8, A10, A12,
A14, A16 are asphericity coefficients.
For convenience, the aspheric surface of each lens face uses the aspheric surface shown in formula (8).But,
The invention is not restricted to the aspheric surface polynomial form that this formula (8) represents.
(example 1)
Fig. 2 is the configuration pie graph of pick-up lens LA in example 1.The data of table 1 have: in example 1
Constitute the 1st lens L1 of pick-up lens LA～the thing side of the 5th lens L5 and the curvature of image side surface
Distance d between radius R, the center thickness of lens and lens, refractive index nd, Abbe number ν d.Table
Data in 2 have: circular cone coefficient k, asphericity coefficient.
[table 1]
[table 2]
The table 5 of rear appearance illustrates that in each example 1,2, various numerical value specify in condition formula (1)～(7)
The value corresponding to parameter.
As shown in table 5, example 1 meets condition formula (1)～(7).
In example 1, the axial aberration of pick-up lens LA is shown in that Fig. 3, chromatic longitudiinal aberration are shown in Fig. 4, the curvature of field and distortion
As shown in Figure 5.Additionally, curvature of field S of Fig. 5 is the curvature of field in sagitta of arc direction, and T is the curvature of field of meridian direction.
Example 2 is also such.As seen in figures 3-5,2 ω=81.0 ° of pick-up lens LA in example 1
, TTL/IH=1.339, Radix Rumicis, ultra-thin, this be just understood that on what axle, the outer chromatic aberration of axle fills
Divide correction, and there is outstanding optical signature.
(example 2)
Fig. 6 is the configuration pie graph of pick-up lens LA in example 2.Table 3 is shown that constituting example 2
The 1st lens L1 of middle pick-up lens LA～the thing side of the 5th lens each lens of L5 and image side surface
Radius of curvature R, the center thickness of lens and lens between distance d, refractive index nd, Abbe number
νd.Table 4 is shown that circular cone coefficient k and asphericity coefficient.
[table 3]
[table 4]
As shown in table 5, example 2 meets condition formula (1)～(7).
In example 2, the axial aberration of pick-up lens LA is shown in that Fig. 7, chromatic longitudiinal aberration are shown in Fig. 8, the curvature of field and distortion
As shown in Figure 9.As shown in figs. 7-9, in example 2 pick-up lens LA entirely draw angle
2 ω=81.2 °, TTL/IH=1.337, Radix Rumicis, ultra-thin, this be just understood that on what axle, axle exogenic color
Aberration fully makes corrections, and it has outstanding optical signature.
Table 5 illustrates corresponding to the parameter specified in the various numerical value of each example and condition formula (1)～(7)
Value.Additionally, the unit shown in table 5 be respectively 2 ω (°), f (mm), f1 (mm), f2 (mm),
f3(mm)、f4(mm)、f5(mm)、TTL(mm)、LB(mm)、IH(mm)。
[table 5]
| Example 1 | Example 2 | Remarks | |
| f1/f | 0.751 | 0.756 | Conditional (1) |
| f2/f | -1.457 | -1.473 | Conditional (2) |
| f4/f | 0.728 | 0.731 | Conditional (3) |
| (R1+R2)/(R1-R2) | -1.347 | -1.349 | Conditional (4) |
| (R3+R4)/(R3-R4) | 1.687 | 1.671 | Conditional (5) |
| d7/f | 0.175 | 0.176 | Conditional (6) |
| |f3|/f | 31.616 | 34.839 | Conditional (7) |
| Fno | 2.40 | 2.40 | |
| 2ω | 81.0 | 81.2 | |
| TTL/IH | 1.339 | 1.337 | |
| f | 3.366 | 3.357 | |
| f1 | 2.527 | 2.537 | |
| f2 | -4.905 | -4.946 | |
| f3 | 106.419 | 116.954 | |
| f4 | 2.452 | 2.454 | |
| f5 | -2.165 | -2.169 | |
| TTL | 3.930 | 3.923 | |
| LB | 1.066 | 1.057 | |
| IH | 2.934 | 2.934 |
Protection scope of the present invention is not limited with above-mentioned embodiment, as long as ordinary skill people
Member modifies or change according to the equivalence that disclosed content is made, and all should include in claims
In the protection domain recorded.
Claims (2)
1. a pick-up lens, it is characterised in that: start to be configured with successively from thing side: there is positive refracting power
1st lens, there are the 2nd lens of negative index, the 3rd lens, there is the 4th saturating of positive refracting power
Mirror, there are the 5th lens of negative index, and meet following condition formula (1)～(6),
0.70≦f1/f≦0.80 (1)；
-2.00≦f2/f≦-1.15 (2)；
0.63≦f4/f≦0.80 (3)；
-2.00≦(R1+R2)/(R1-R2)≦-1.25 (4)；
1.30≦(R3+R4)/(R3-R4)≦2.50 (5)；
0.10≦d7/f≦0.19 (6)；
Wherein,
The focal length that f: pick-up lens is overall；
The focal length of the f1: the 1 lens；
The focal length of the f2: the 2 lens；
The focal length of the f4: the 4 lens；
The radius of curvature of the thing side of the R1: the 1 lens；
The radius of curvature of the image side surface of the R2: the 1 lens；
The radius of curvature of the thing side of the R3: the 2 lens；
The radius of curvature of the image side surface of the R4: the 2 lens；
The center thickness of the d7: the 4 lens.
Pick-up lens the most according to claim 1, it is characterised in that: meet following condition formula (7),
10.00≦|f3|/f (7)；
Wherein,
The focal length that f: pick-up lens is overall
The focal length of the f3: the 3 lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/257,370 US9715089B1 (en) | 2016-01-27 | 2016-09-06 | Camera lens |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-013665 | 2016-01-27 | ||
| JP2016013665A JP5922854B1 (en) | 2016-01-27 | 2016-01-27 | Imaging lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105892017A true CN105892017A (en) | 2016-08-24 |
| CN105892017B CN105892017B (en) | 2019-04-26 |
Family
ID=56015199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610279378.9A Active CN105892017B (en) | 2016-01-27 | 2016-04-30 | Pick-up lens |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9715089B1 (en) |
| JP (1) | JP5922854B1 (en) |
| CN (1) | CN105892017B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161654A (en) * | 2019-05-08 | 2019-08-23 | 瑞声声学科技(深圳)有限公司 | Camera optical camera lens |
| CN113866950A (en) * | 2017-04-18 | 2021-12-31 | 浙江舜宇光学有限公司 | Imaging lens |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7149095B2 (en) | 2018-04-05 | 2022-10-06 | 東京晨美光学電子株式会社 | imaging lens |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5922854B1 (en) | 2016-05-24 |
| CN105892017B (en) | 2019-04-26 |
| JP2017134224A (en) | 2017-08-03 |
| US9715089B1 (en) | 2017-07-25 |
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